Abrading tool



. April 23, 1935. c, s-ru e s 1,998,562 ABRAbINe TOOL I Filed May 23, 1952 7! v 1 '2 45 5 52; 9 4 I E 45 do 4 6' 3 L 48 In l i 45 g 45 INVENTOR Char/e6 ESfFup/LS has ATTORNEY Patented Apr. 23, 1935 I 1,998,562

UNITED STATES PATENT OFFICE ABRAD ING TOOL i Charles E. Sturgis, Rochester, N. Y.' Application May 23, 1932, Serial No. 613,065

8 Claims. (01. 15-198) This invention relates to an abrading tool for 'The stem 8 is providedat its inner end with cleaning and polishing purposes and is particua screw threaded socket 9 to take the screw larly adapted for piston heads, combustion heads threaded shank ID of a screw bolt whose head I I or other parts of automobile or other engines. is adapted to lie within the aforesaid central One object of the invention is' to provide an depression 2 of the brush headI. A washer I2 abrading and polishing tool embodying among and a lock nut I3 are preferably arranged beother characteristics, considerable flexibility partween the bolt head I I and the bottom of the ticularly as regards the manner or method of depression 2 to prevent accidental disconnection connecting the various parts together so as to of the brush head from the stem 8. obviate unnecessarywear andto reduce wear of The diskshaped brush head is provided with 9 one part on another to'a minimum. an annularly arranged series of openings I4 sur- Another object of the invention resides in the rounding the aforesaid central perforation 3 and provision of a metallicabrading tool wherein the the disk on its'inner face has a series of annular abrading elements are mounted for a universal shaped flanges, one surrounding each opening I4, movement to prevent strains and wear on the tool providing a plurality of annular seats I5 about 15 incident to one part actingagainst another and said openings I4. to insure an effective cleaning or removal of A brush or 'abrading unit or tuft of bristles is paint, paper or foreign substances from bodies indicated, general y, b the referenfie Character of articles or surfaces. A. Each tuft of bristles consists preferably of a A still further object isto provide an abrading p ura ty of e at ve y t 3 v(3011M, 'Wire tool in which an adjustment may be readily elements I6 preferably of equal length and which effected to compensate for any unevenness of a y in Pa a throughout their parts incident to wear or because of inaccuracies lengths a d which a e COImected together at their in measurements in the production of the various nner ends by a Steel other metal Cap parts. I ing a tapering side wall I8. The cap may be 5 With these and other objects in view, the insecured on the group of bristles in any suitable vention consists in the construction and novel manner.

combination and arrangement of parts herein- The tufts of bristles A are adapted for awork- 'after fully described, illustrated in the accoming fit in the openings I4 through which the tufts panying drawing, and set forth in the claims hereproject. As illustrated, the tapered side walls I8 30 to appended, it being understood that various of the caps I! are rotatably mounted on the anchanges in the form, proportion, and minor denular seats I5 of the disk or head I on which seats tails of construction, within the scope of the the respe v u s may rotateclaims, maybe resorted to without departing from A disk I 9 of relatively thin metal, preferably the spirit of the invention or sacrificing any of steel, is disposed on the aforesaid stem 8, having the advantages thereof. a central perforation 263, embracing the cylindri- In the accompanying drawing: cal portion 2| of stem 8,'adjacent a collar 22 in- Figure l is a side elevation of the invention. tegral with the stem 8. This disk has its perfora- Figure 2 is a similar view partly in section. tion 20 of a size to permit of a free sliding move- 40 Figure 3 is a sectional view on the line 3-3 of ment of the same on the cylindrical portion 2I of 40 Figure 2, with the tuft units removed. the stem 8 and toward and away from the caps i u 4 i f entary inverted plan view I! of the brush units or tufts and by virtue of of the disk brush head. this free play of the disk I9 it may have rotative Referring now more particularly to the accommovement in either direction on the stem 8 and panying drawing, the reference character I indialso has a slight wavering, floating or rocking 15 to prevent rotation of the brush head on the stem. movement of the brush head I or disk I9 and percates'a rotary disk shaped'brushhead of rela- 'movement so that as the brush head I is rotated, tively thin metal, preferably steel and having a carrying the rotatable and slightly tiltable tufts central inwardly directed resilient depression 2 of bristles, there is no undue frictionalresistance Y provided with'a central perforation 3, elongated of the tuft units against the disk I 9; obviating as at 4 from the sides ofwhich extend parallel undue wear either on the heads or caps of the flanges 5 to provide for substantial flat faces bristles or on the disk andpermitting free and to bear against oppositely disposed flat side faces easy rotation of the brush head as well asa free Gof'the reduced inner end'lof the stem 3 to and easy rotation of the tufts independently of -which the brush head I is secured and whereby one another and independently of therotative mitting also a slight individual bodily tilting or rocking movement of the tufts on their seats 5.

I'he aforesaid openings M are flared outwardly, as at I l, to permit of a slight bodily tilting or rocking movement of the tufts and by virtue of this outward flaring Id of the openings I4 the outer coil bristles E5 of the brush units or tufts are permitted to yield and bend under pressure without the formation of a permanent bend or kink therein, the flared or rounded edge l4. permitting" of considerable flare being given to the bristles dependin upon the degree of pressure thereon and depending also upon the flexibility of the coiled bristles.

In the use of the present tool the length and flexibility of the bristles will depend upon the nature of the work to be done. In some instances, the bristles will be short and; closely compacted and of a stiifness calculated to maintain the bristles in parallelism. Under certain conditions, the bristles will need to have resiliency and this may be acquired with the bristles of certain lengths and compacted close together or by varying the length of the bristles or varying the pitch or loose winding of coils the predetermined elasticity or resiliency of bristles may be obtained. This will all depend upon the nature of the work for the present tool to perform and it will be understood that there are many uses to which the tool may be put. Even labels may be removed from bottles or paper glued to various glass articles maybe removed without scratching the glass and experience has taught that surfaces of metal may be likewise operated upon for removing paint or foreign. accumulations therefrom without injury to the body material and upon removal of. the paint or foreign accumulations the body material may behighly polished. V

If, when assembling the various parts of the present tool, or if by virtue of. wear of parts incident to use of the tool, or if the disks need to be further separated or if it be discovered that there are inaccuracies in lengths of tuft units A or depths of caps H of the bristles I6 or if for inaccuracies of other parts or because of other reasons an adjustment is necessary or advisable to prevent friction or for other reasons, it may be readily accomplished by a deepening of the depression 2 in any suitable manner or the depression 2 may be manipulated. in any suitable manner to render it less shallow, thereby readily compensating for any such inaccuracies in the matter of variations of normal conditions. To this end the disk I- has a certain amount of flexibility at its depression 2.

The construction and arrangement of all of the parts of the present tool is such that with the exception of the rigid connection of the disk head i with the stem 8, the movable relation of the other parts with relation to one another affords such flexibility of action between the parts as to prevent breakage and undue wear. The head I and the stem 8 may be connected together otherwise than as illustrated and described so far as the appended claims permit.

The tool for ordinary purposes is of light weight and is easily handled and readily stored or transported or shipped and in use it may be readily operated by any suitable power driving means (not shown) connected up in any suitable or well known manner with the stem 8.

It will be understood that the brushhead and disk l8 may be of a shape other than disk shape and that for certain purposes the brush units or tufts A, especially the bristlesmay be composed of parts which may be readily assembled and easily disassembled so that worn or otherwise defective parts may be readily replaced.

What is claimed is:

1. A rotary abrading tool comprising a head provided with a central perforation and a plurality of openings surrounding the central perforation, a tuft of bristles extending through each of said openings and rotatably mounted therein, a stem having its outer end secured in said central perforation of the head for rotation with they head, a thin sheet metal member loosely mounted on the stem over the inner ends of said tufts ofbristles, and a collar securedon the stem to maintainv said sheet, metal member relatively close, to, the inner ends: of the tufts of bristlesto prevent accidental inward displacement of the tufts of bristles and yet permit of rotation of the tufts of bristles independently of one another and independently of the rotative movement of the brush head. 7

2. A rotary abrading tool comprising a head, a plurality of tuft units rotatably mounted on the brush head and having inward sliding movement on said head, a stem to which the brush head is secured, a member loose on the stem. and spaced fromv the brush head by the inner ends of the tuft units, and means tolimit movement of the loose member outwardly on the stem so as to prevent accidental inward displacement of the tuft units and yet permit rotation of the tuft units independently of said member.

3. A rotary abrading tool comprising a. head,

-a plurality of tuft units rotatably mounted on the brush head and having inward sliding movement on said head, a stem to which the brush headis. secured, a member loose on the stem and spaced from the brush head by the inner ends of the tuft units, means on the stem to limit movement of the loose member outwardly on the stem away from the brush head, said tuft units being rotatable one independently of another and independently of the brush head and held against accidental inward displacement by said member.

4. An abrading tool comprising a head having a central; depression and a perforation therein, a stem having. connection with the head through said perforation, a plurality of tuft, units rotatably mounted on the brush head and having inward sliding movement on the head, and a memberrotatable on the stem and rotatively engageable with the inner ends of the tuft units to hold the latter against displacement inwardly of said head, the said depression being yieldable to permit deepening or shallowing of the same so as to adjust the space between the head and said rotatable member.

5. An abrading tool, comprising a rotatable head, a stem rigidly connected at one end to the head, a plurality of tuft units rotatably carried by said rotatable head and having slight bodily longitudinal and lateral movement relative to said head, and means including a member loose on the stem and having movable engagement with the inner ends of the tufts to limit inward longitudinal bodily movement of the latter with relation to the head.

6. An abrading tool comprising a rotatable head, a stem fixedly connected to the head, a tuft unit having loose connection with the head for universal movement relative thereto and independently of rotation of the head, a member loose on the stem and rotatably engaging the inner end of the tuft unit and independently rotatable relative to the rotation of the head or the tuft unit, and means to limit the movement of said loose member outwardly of the stem.

7. An abrading tool comprising a rotatable head, a stem fixedly connected to the head, a tuft unit having loose connection with the head for universal movement relative thereto and independently of rotation of the head, a member loose on the stem and rotatably engaging the inner end of the tuft unit and independently rotatable relative to the rotation of the head or the tuft unit, means for limiting movement of the loose member outwardly on the stem, said loose member having slight play longitudinally of the stem between the inner end of the tuft unit and said last mentioned means and means for adjusting the fixed connection between the head and stem to compensate for wear or inaccuracies in thesize of any of the said elements. 8. An abrading tool comprising a head having seats thereon, a plurality of tuft units mounted loosely in said seats for slidable, tiltable and rotatable movement in said seats, a member slidably, rotatably and tiltably mounted on said stem over the inner ends of the tuft units and normally resting thereon, and means connected with the stem adjacent said member to limit movement of said loose member outwardly along the stem away from the inner ends of the tuft units to thereby maintain the tuft units in position to return to normal seated rotatable position after a sliding or tilting movement.

CHARLES E. STURGIS. 

